Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32f1/STM32F100/WWDG/CFR#0x0
Configuration register (WWDG_CFR)
7-bit window value
Timer Base
Early Wakeup Interrupt
https://github.com/modm-io/cmsis-svd-stm32